Simple fix?
this error for line 44.
lWindowClass.hbrBackground := ^Void(COLOR_WINDOW + 1);
Severity Code Description Project File Line Suppression State
Error (E62) Type mismatch, cannot assign “^Void” to “^struct_HBRUSH” BasicWindowsApp C:\Users\Public\Documents\RemObjects Samples\RemObjects Oxygene for Island\GUI\Basic Windows GUI App\Program.pas 44